3D36:
reference: How to Switch Off a Histidine Kinase: Crystal Structure of Geobacillus stearothermophilus KinB with the inhibitor Sda., Bick MJ, Lamour V, Rajashankar KR, Gordiyenko Y, Robinson CV, Darst SA, J Mol Biol. 2008 Dec 11. PMID: 19101565

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